Book of Common Prayer (page 421)

The Celebrant then says this or some other appropriate prayer

Let us pray.

Almighty God, look with favor upon this person who has
now reaffirmed his commitment to follow Christ and to serve
in his name. Give him courage, patience, and vision; and
strengthen us all in our Christian vocation of witness to the
world, and of service to others; through Jesus Christ our
Lord. Amen.

A prayer for the special work in which the person will be engaged may
be added.

The service then continues with the exchange of the Peace and the
Offertory.